Work Step by Step
Recall that the sum of all of the oxidation numbers must be -1 in this molecule. We know that the oxidation number of oxygen is -2. Thus, the oxidation number of Mn must be +7.
You can help us out by revising, improving and updating this answer.Update this answer
After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.